3-spined stickleback · Gasterosteus aculeatus

3-spined stickleback in the Parsons Brook

Largest measured 3-spined stickleback: 7.1 cm

The largest 3-spined stickleback measured in Environment Agency surveys of the Parsons Brook was 7.1 cm, recorded at Parsons Brook sq on 14 August 2002.

Across 232 measured 3-spined stickleback, the median measured length was 4.5 cm.

Surveyors recorded weights for 230 3-spined stickleback. The median was 0 oz (0.001 kg) and the largest recorded weight was 0.1 oz (0.003 kg).

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the Parsons Brook.

See 3-spined stickleback records across England →

Most recent observation19 August 2025Parsons Brook Q · 2 fish

Largest measured 3-spined stickleback: 7.1 cm
Median length: 4.5 cm
Fish measured: 232
Survey locations: 2

Individual EA measurements

Largest measured 3-spined stickleback

The largest individual measurements in this river and species dataset. Equal measurements are retained as separate surveyed fish.

Length	Survey date	Survey location	Survey ID
7.1 cm	14 Aug 2002	Parsons Brook sq	62821
6.6 cm	4 Jul 2003	Parsons Brook Q	76698
6.3 cm	8 Aug 2005	Parsons Brook Q	87405
6.3 cm	4 Jul 2003	Parsons Brook Q	76698
6.2 cm	4 Jul 2003	Parsons Brook Q	76698
6.2 cm	4 Jul 2003	Parsons Brook Q	76698
6.1 cm	4 Jul 2003	Parsons Brook Q	76698
5.8 cm	7 Aug 2006	Parsons Brook Q	102298
5.8 cm	4 Jul 2003	Parsons Brook Q	76698
5.8 cm	4 Jul 2003	Parsons Brook Q	76698

Lengths are direct survey measurements. RiverFish does not estimate fish weights from length.

Explore the river

Where 3-spined stickleback were found

Each point marks a survey location with at least one 3-spined stickleback record.

Choose a point on the map to see what was recorded there.

Map points are approximate and don’t show fishing access. Check local permissions before visiting.

Place surveyed	First recorded	Last recorded	Visits finding 3-spined stickleback
Parsons Brook Q	4 Jul 2003	19 Aug 2025	6
Parsons Brook sq	14 Aug 2002	14 Aug 2002	1

Choose a point or table row to see the location. More survey visits can mean more records, but not necessarily more fish.

2002–2025

Survey records by year

Each bar shows how many survey visits recorded 3-spined stickleback that year.

102

103

104

105

106

007

008

009

010

011

012

113

014

015

016

017

018

019

020

021

022

023

024

125

Fish measured by surveyors

Measured length distribution

See how the 232 measured fish were spread across different length ranges.

Smallest: 1.5 cm
Lower quarter: 4.2 cm
Median: 4.5 cm
Upper quarter: 4.8 cm
Largest: 7.1 cm

0–99 mm

232

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 230 3-spined stickleback. This is a subset of the measured fish and may not represent the whole population.

Lightest: 0 oz (0.001 kg)
Lower quarter: 0 oz (0.001 kg)
Median: 0 oz (0.001 kg)
Upper quarter: 0 oz (0.001 kg)
Heaviest: 0.1 oz (0.003 kg)

These are direct individual weights recorded by Environment Agency surveyors. Combined bulk weights are not included.

More fish in this river

Explore the Parsons Brook

Compare other species with enough survey and measurement data for a detailed page.

Bullhead Stone loach European eel Roach

Before you fish

Good to know

These are past survey records, so the fish present today may be different. Map points are approximate—check local access, permissions and fishing rules before visiting.

Learn how RiverFish uses the data →